If you fly out of Beauvais airport, which is closed 23:00-04:00 (in our case, the terminals opened at 03:30) you can spend time at this McDonald's. The restaurant itself is open until 00:00, but we sat at tables outside until almost 03:00 (the lady from the staff said it was not a problem). The food was very good, warm, and the Lipton had a much stronger taste than in McDonalds in Poland (even though we ordered Lipton with ice). We waited 15 minutes for the order. A big plus is the cleanliness of both the restaurant and the toilets. There are also contacts available for charging the phone. Very nice, spacious restaurant. The employees are nice and tidy.
PS. Drive thru open until 03:00.
PS2. If you have gluten intolerance/celiac disease, cheese fries are safe and very tasty.